摘要
以15年生嘎啦苹果/平邑甜茶为试材,采用^(15)N同位素示踪技术,研究有机无机肥分次配施对嘎啦苹果/平邑甜茶生长、^(15)N-尿素吸收利用及损失的影响.结果表明:与不施有机肥相比,有机无机肥配施显著提高了植株根冠比、叶绿素含量、单株叶片总氮量和单果质量,且有机无机肥分次配施的效果要优于有机无机肥一次性配施.有机无机肥配施提高了各器官对氮的吸收征调能力(Ndff值),其中有机无机肥分次配施的效果更显著;而不同施肥处理各器官的Ndff值均表现为果实最高,其次是叶片、一年生枝、细根、粗根和多年生枝,中心干最低.有机无机肥分次配施植株总氮量和^(15)N肥料利用率分别为395.39 g和28.4%,显著高于有机无机肥一次性配施处理(342.77 g和21.1%)和不施有机肥处理(296.41 g和14.6%),而^(15)N损失率为51.3%,显著低于有机无机肥一次性配施处理(57.5%)和不施有机肥处理(60.6%).
Fifteen-year-old‘Gala’/M.hupehensis Rehd.trees and 15N trace technique were used to explore the effects of split combined application of organic-inorganic fertilizers on plant growth,15N absorption,utilization and loss.The main results were as follows:compared to control,combined application of organic-inorganic fertilizers significantly increased the root-shoot ratio,chlorophyll content,total nitrogen content of leaves and mean fruit mass.The effects of split combined application of organic-inorganic fertilizers treatment were more obvious than one time combined application.Combined application of organic-inorganic fertilizers treatment improved the capacity of 15N derived from fertilizer(Ndff)of different organs,with the effects of split combined application of organic-inorganic fertilizers treatment being more significant.The Ndff value of fruits in different treatments were the highest,followed by leaves,biennial branches,fine roots,large roots and perennial branches,and lowest in trunks.Total N content of plant and 15N-urea utilization rate of the split combined application of organic-inorganic fertilizers treatment were 395.39 g and 28.4%respectively,which were obviously higher than the treatments of one time combined application(342.77 g and 21.1%)and no organic fertilizer application(296.41 g and 14.6%),while 15N loss rate was 51.3%,which was obviously lower than the treatments of one time combined application(57.5%)and no organic fertilizer application(60.6%).
作者
陈倩
刘照霞
邢玥
吴晓娴
葛顺峰
姜远茂
CHEN Qian;LIU Zhao-xia;XING Yue;WU Xiao-xian;GE Shun-feng;JIANG Yuan-mao(College of Horticulture Science and Engineering,Shandong Agricultural University/State Key Laboratory of Crop Biology,Tai’an 271018,Shandong,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2019年第4期1367-1372,共6页
Chinese Journal of Applied Ecology
基金
国家重点研发计划项目(2016YFD0201100)
国家自然科学基金项目(31501713)
国家现代农业产业技术体系建设资金项目(CARS-27)
山东省泰山学者攀登计划资助~~
关键词
有机无机肥
分次配施
嘎啦苹果
15N-尿素
吸收
利用
损失
organic-inorganic fertilizer
split combined application
Gala apple
15N-urea
absorption
utilization
loss
作者简介
通讯作者:姜远茂,E-mail:ymjiang@sdau.edu.cn。
